Even if you take all the steps or recommendations mentioned in the above articles there are still some obstacles we have to tackle when it comes to spam filtering. Spam filtering tools are still evolving and let’s face it are simply programs trying to determine based on known criteria what is spam or not.
Many do not update their virus programs (that is if they even have one in the first place) and they believe some of the most gratuitously ridiculous offers. That is as long as those “offers” insinuate easy riches with little effort or expense. To that end; there is your weakest link. The propensity to believe misinformation that caters to one’s inner desires.